Window-shade cutter.



No. 723,760. I PATENTED MAR. 24,1903.

L. 0. THOMPSON. Y WINDOW SHADE CUTTER.

AIPLIGATION FILED JULY 3| 1902.

N0 MODEL.

-r '1 T lI UNITED STATES P TENT OFFICE.

LYNN C. THOMPSON, OF DARLINGTON, INDIANA.

WINDOW-SHADE CUTTER.

SPECIFICATION forming part of Letters Patent N 0. 723,760, dated March 24, 1903. Application filed July 3, 1902. Serial Ila-114,293. (No model.)

To rtZZ whom it may concern;

Be it known that l, LYNN C. THOMPSON, a citizen of the United States, residing at Darlington, in the county of Montgomery and State of Indiana, have invented a new and useful VVindow-Shade Cutter, of which the following is a specification.

This invention relates to window-shade cutters, such as are generally used for the purpose of cutting or trimming window-shades to the required width; and it has particular reference to that class of devices in which the trimming is accomplished after the curtain or shade has been wound upon its roller'by means of a rotatably-mounted knife or cutter.

My invention has for its object to provide a device of this class which shall possess superior advantages in point of simplicity, durability, and general elficiency; and with these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described,and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a plan view of a device embodying my invention. Fig. 2 is an end view of the same on a larger scale. Fig. 3 is a sectional view taken on the line 00 a: in Fig. 2 on the same scale as Fig. 2.

Corresponding parts inthe several figures are indicated by like characters of reference.

1 designates a'base which is made of suitable length to support a shade while being operated upon, and upon the upper side of this base is marked a scale 2. Yokes or clamps 3 3, of some suitable springy material, are mounted upon the base 1 to receive and hold the shade when wound upon its roller and arranged to be operated upon by the machine.

Suitably attached to the base 1 at one of its ends is a bracket 4, supporting a sleeve 5, which is preferably cast or formed integrally with said bracket and which is provided with a shoulder 6.

7 designates a ring mounted revolubly'upon.

the sleeve 5 and provided with an annular groove 8, engaged by hook-shaped holders 9, several of which are attached to the sleeve 5 in such a manner as to hold the said ring 7 revolubly thereon and practically in engagement with the shoulder-6, whereby steadiness of movement is attained.

The revoluble ring 7 is'provided with a handle 10, which is socketed to receive a longitudinally-movable steni'll, the upper end of which has a handle 12, wherebyit may be drawn in an outward direction against the tension of a spring 14, which is coiled upon the said stem and the outer end of which bears against the outer end of the socket, while its inner end has a bearing against the shoulders of a knife or cutter 15, which is secured to the inner end of the stem 11 and the point of which projects through a slot 16 in the inner end of the handle or socket. The knife or blade15 is 'so disposed that its inner flat side shall bear against the outer end of the sleeve 5, so that-its point 17 and cutting edges 18 18 shall exercise a shearing action with relation to the edge of the said sleeve.

The stem 11 is provided with a notch 19, which when the said stem is drawn to its outward limit is engaged by a trigger-lever 20, which has pivotal connection with the outer end of the handle or socket 10. A spring 21 is suitably arranged to bear against the trigger-20, so as to hold the latterin engagement with the slot 19. This position is clearly indicated in Fig. 3 of the drawings. The socketed handle 10 is provided with a crank 22, by means of which it may be conveniently manipulated to rotate the ring 7 upon the sleeve 5. U A cover-plate23,secured by means'ofscrews 24, is provided, whereby access may be had to the interior of the socket in order that the knife or cutter 15 may be removed for sharpening or to enable necessary repairs to be made when required.

The stem 11 is screw-threaded atits upper end, so as to receive the cap or handle 12, which may thus be removed from the said stem. The cover-plate 23 is provided with an opening 23 at its lower end of sufficient size to admit of the passage of the lower end of the stem 11, to which the knife orblade 15 is preferably attached by means of screws 15, so as to render itreadily detachable. It will thus be seen that by re-movingthe. cap or handle 12 the stem 11 may be slid downward sufficiently to expose the screws by means of which the blade is secured, thus enabling the latter to be detached for sharpening without the necessity of removing the coverplate 23.

Near the end of the base to which the cutting mechanism just described is attached is secured a plate 25, having lugs 27, between which is pivotally mounted a lever 28, having a curved shield 29, which may be used to exert downward pressure upon the shade which is being operated upon, thus holding the same with absolute security while itis being trimmed.

The operation of my invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed. The shade having been wound upon its roller, the end which is to be trimmed is passed through the sleeve 5, the cutter-blade having been previously withdrawn to the position shown in Fig. 3. The shade is then adj nsted to the desired position with relation to the gage or scale upon the base or support and is then clamped and held firmly by means of the lever28, lateral movement being prevented by means of the yokes 3. The cutter is then released by tripping the lever 28 and is forced in an inward direction by the action of the spring 14, while at the same time the ring 7 is rotated upon the sleeve 5 by means of the handle. The end of the shade and roller which projects beyond the sleeve 5 will thus be smoothly and evenly trimmed off, the knife being gradually fed by the spring 1-t until the operation has been completed.

I desire it to be understood that while I have in the foregoing described the preferred with a slot at itsinner end, a cutter mounted in said socket and extending through the slot therein, 'a stem attached to said cutter and extending longitudinally through the socket and a spring coiled upon said stem and hearing against the cutter and against the outer end of the socket and exercising its tension to force the cutter through the slot at the inner end of the socket.

2. In a device of the class described, the combination of a supporting-sleeve, a ring revoluble thereon and having a socketed handle, a cutter mounted slidingly in said handle and projecting through a slot therein, means for forcing said cutter in an inward direction,

and a trigger for retaining said cutter at the outward limit of its movement, substantially as set forth.

3. In a device of the class described, the

combination of a base having a scale marked thereon and provided with yokes, a clampinglever having a curved shield adapted to engage the material to be operated upon and the cutting mechanism at the ends of the base comprising a supporting-sleeve, a revoluble ring having a socketed handle, and cutting means within the latter, substantially as set forth. 4C. In a device of the class described, the combination of a supporting-sleeve, a ring mounted revolubly on said sleeve and having a socketed handle, a detachable cover-plate atthe innerend ofsaid handle,a stem mounted slidingly in the socket of the latter and having a cutting-blade projecting through a slot at the inner end, and means for forcing the said stem and cutting-blade in an inward direction, substantially as set forth.

5. In a device of the class described, a socketed handle having a detachable cover-plate and provided with openings at its upper and lower ends, and a spring-pressed stem mounted slidingly therein, projecting through the opening at the upper end and carrying a cutting-blade which projects through the lower end thereof, substantially as set. forth.

(5. In a device of the class described, a socketed handle having openings at its upper and lower ends, in combination with a springpressed stem mounted slidingly therein, projecting through the opening at the upper end and having a detachable cap, and a cuttingblade mounted detachably at the lower end of said stem and projecting through the slot at the lower end of the handle, substantially as set forth.

7. In a device of the class described, the combination of the socketed handle, a springpressed stem mounted slidingly within the same, detachable means for limiting the inward movement of said stem, and a cuttingblade secured detachably at the lower end of said stem and projecting through aslot at the inner end of the socketed handle, substantially as set forth.

8. In a device of the class described, the

combination of the socketed handle, a stem mounted slidingly within the same, detachable means for limiting the inward movement of said stem, a detachable cover-plate at the inner end of the handle having an opening for the passage of the lower end of the stem, and a cutting-blade secured detachably at the lower end of the stem and projecting through a slot at the inner end of the socketed handle, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

LYNN O. THOMPSON.

\Vitnesses:

W. O. MOUNT, W. P. CARD. 

